Chasing mill with stationary table and radially arranged roller



Search Rooi Aug. 26, 1947. w. B. CHAPMAN CHASING HILL WITH STATIONARY TABLE AND RADIALLY ARRANGED ROLLER Filed May 29, 1945 3 Sheets-Sheet 2 l l //7/f////f n4/r. l /n -1| 5.... a. n n, fw 7 pm m 3 1. 3 ma, Y z 7 l .n R 3 n y 3 f y wf.. @n 9 h B .T 3 R 4. 3 m 6 A 4, ola ...dil l \6 .d M un 4 6 n/u 2 r/J M., Il 7. .z T 3 .w .L J w, I 26 J r. a, 4l ,W e nF/,HQI -le 3 2 ulnfcl. l n 2 XL Pu M 8 l Jhwllvnll IIIHH IIIIIIIII l .4 n n nVl L lJAvuhllnunullh I d m .w lf mnuxnnnuwnhuunn 3 5 0 .unuwsnllnn'nw um 3 0, Mr 0r 2 L ml- 2 7 .||'||||l|| f U5 4, Tl. n.14 3 M Aug. 26, 1947- w. B. CHAPMAN Search ROO CHASING MILL WITH STATIONARY TABLE AND RADIALLY ARRANGED ROLLER Filed May 29, 1945 3 Sheets-Sheet 5 BY @a Search riool Patented Aug. 26, 1947 UNITED STATES PATENT OFFICE CHASING MILL WITH STATIONARY TABLE AND RADIALLY ARRAN GED ROLLER 1I) Claims.

1 My invention relates to grinding mills employing rollers which both roll and skid.

My object is to provide a mill of this character adaptable for processing ores, minerals, medi- 2 to oblique bars 6 and 9 at the top portions and a longitudinal top bar I3 is secured to the upper end portions of oblique 1 and III. A bearing I4 is mounted on the middle lateral bar 5, and a ball cinals, paints, cements, herbs, plastic masses and 5 bearing is mounted on the top of the longitudinal their component parts. Other objects will appear bars I2-I3. 'I'his ball bearing consists of a. lower as the description progresses. ball race member I5, an upper ball race member Figure 1 represents a front view of a mill unit I6 and balls I1. constructed in accordance with my invention; The vertical shaft I8 is threaded at the upper Fig. 2, a top view of Fig. 1; Fig. 3, an enlarged 10 end portion and is mounted in bearing I4 andthe vertical cross section partly broken away; Fig. 4, ball bearing. A nut I9 is screwed on the vertical a. fragmentary top view of the rollers and guide shaft I8 against the upper ball bearing race memstructure; Fig. 5, a sectional view on the line fber I6 and a. lock nut 20 is screwed in the nut IS. 5 5 in Fig. 3; Fig. 6, a sectional view of the upper The guide structure includes two horizontally portion of the frame structure on the line 6-6 15 diSpOSed annular plates 2|22. u Series 0f Vertiin Fig. 3; Fig. 7, a fragmentary View of the vertically disposed flat plates 46, the ends of which cal shaft showing the peripheral groove; Fig. 8, a are secured to the annular plates, and a spider top view of a modification of the mill unit promember having a hub 23. and arms 34 which are vided with facilities for angular adjustment of the secured to the interior of the guide Structure. roller Shafts; Fig. 9. a front View of Fig. 8, partly The vertical plates are disposed in pairs, the merribroken' away; Fig. 10, a fragmentary top view of bers of each pair being spaced to provide guidethe guide structure, jointed guide blocks, and Ways 25. The hub 23 0f the Spide!- member iS rollers; Fig. 11, an enlarged fragmentary View mounted on the vertical shaft I8 and secured by showing the jointed guide block in a guide way; set screws 26 extending into the peripheral groove Fig. 12, a top view of a jointed guide block; Fig. 25A in the Shaft |3- 13, a side View of Fig. 12; Fig. 14, an enlarged The 10We1' DOltiOn 0f the feed tube 21 iS diS- sectional view of an outer end assembly; Fig. 15, lposed in the guide structure and rests on the a top view of a stud and shaft assembly; Fig. 16, Spider member arms 24. A spider member 65 is a front view of Fig. 15; and Fig. 3A a fragmentary mounted on the vertical shaft I8 and supports view of the spring and guide structure. 30 the upper portion of the feed tube. A funnel 66 Although I show the preferred embodiments of is disposed on the upper end of the feed tube and my invention, I do not thereby limit myself to Secured by e collar 61. the precise forms shown but wish it understood The inner end DOItiOnS 0f the hOrZOntai arms that such forms come within the scope of what 30 are mounted on the upper annular plate 22 hereinafter is claimed, and that various changes and Secured by Welding 01 Otherwise SO aS t0 eX- in the precise details may be made within the tend outwardly from the guide structure. A lue' scope of the claims Without departing from the 3| depends flOm the Outer end pOitiOn 0f each spirit of the invention. horizontal arm and is provided with projections The mill unit first illustrated in the drawings 32-33- A block 34 is disposed between the loroincludes a frame structure, a vertical shaft, a 40 ieCtiOIiS 32-33 0n each lug 3| and a block 35 iS guide structure, a feed tube, a series of horizondiSDOSed in each gudeWay 25 in the guide structally disposed arms, a horizontal shaft under eaoh turc. A horizontal shaft 36 is disposed beneath horizontal arm, a roller on each horizontal shaft, each erm 3 With One end extending through and a grinding table. block 34 and the other end extending through The foundation of the frame structure comblock 35- A Pin 37 runs through bleek 34, PrO- prises horizontal side bars I-2, horizontal lateral ieCtiOn 32-33 und the end Portion 0f Shaft 35, end bars 3 4, and a middle lateral bar 5. one thereby pivotally connecting shaft 36 to the deend consists of oblique bars 6-1 the lower ends pending 111g 3|. The hole in guide block 35 is of which are secured to the foundation by weldlarger 'than the Shaft 36 and is disposed obliquely ing or otherwise and the upper ond portions tied so as to alord clearance for the shaft when the together by a tie bar 8. The other end consists block mOVeS 'upward in the guideway. of obliquo bars s lu the upper end portions of A roller assembly is mounted on each horiwhich are connected by a tie bar I I and the lower zontal shaft 36. Each roller consists of an outer ends secured to the foundation by welding er cylindrical shell R with a head mounted in each otherwise. A longitudinal top bar I2 is secured 55 end portion. One lhead consists of the member 38 having central hole and a recess concentric with the central hole. A bushing 39 is disposed in the central hole and mounted on the shaft 36 so that the head portion of block 34 is disposed in the recess. The other head is integral with a stepped cone 40 which contains a bushing 4l mounted on the shaft 36.

A conical distributor 42 is mounted on the vertical shaft I8 below the feed tube 21 and secured by a collar 42 and set screw 43. A horizontally disposed circular grinding table 44 is mounted on the frame work foundation below the rollers and the conical distributor. A circular driving band '45 is mounted on the depending lugs 3l and is adapted to be operated by a belt 45B. Open springs 25A may be disposed in each guideway 25 to increase the pressure of the rollers.

The mill may be operated by a belt around the driving band or by any other suitable means.

Material is introduced through the funnel 66 and the feed tube 21 and strikes the conical distributor 42 which directs it towards and under the stepped cone portions 4D of the rollers. The stepped cone end of each roller is free to rise and fall as indicated by the dotted position in Fig. 3. This is facilitated by reason of the shaft 36 being mounted in guide block 35 in the guideway 25. and the pivotal connection of the shaft 36 in the lugs 3|. This takes care of the coarse material as it is received in the various sizes at the inner ends of the rollers and yet holds the rollers in substantial uniform relation to the grinding table at the outer ends of the rollers so as to deliver the material relatively finer than when introduced. The material is discharged at the peripheral edge of the grinding table so that the material may be collected in any suitable manner. The springs 25A exert pressure on the guide blocks so as to increase the crushing effect of the rollers.

The whole movable assembly may be raised by screwing nuts lil-20 downward on the vertical shaft I8 thereby increasing the space between the rollers and the grinding table.

The modification shown in Figs. 8-9 has the same frame structure, guide structure, feed tube and grinding table as the unit illustrated in Figs. 1-2. This modification affords facilities and means whereby the rollers may be disposed at different relative angles to facilitate processing different materials. The angular dispositions increase or decrease the slippage or skidding of the rollers.

'I'his modification includes a jointed guide block at the inner end of each roller and a stud assembly at the outer end. The jointed guide block consists of two parts 58-59 pivoted together by a pin B0. The part 58 slides in the guideway in the guide structure as in the mill unit first described.

In addition to the driving band 45 which is mounted on the horizontal arms 3D, an auxiliary band 46 is spaced from the band 45 to provide a slot 48 and secured to the band 45 by cleats 41. A horizontally disposed stud 50 is provided with a threaded shank and a tongue T. The threaded shank extends through the slot 48 and is secured by nuts |-52 screwed thereon against spacer collars which are wedge shaped. Spacer collars 53--54 are disposed between nut 52 and nut 5| and the bands, and spacer collars 55-56 are disposed between nut 52 and the bands. The inner end of each shaft 51 is disposed in the recess 6l of the jointed guide block and the outer end is provided with a slot S in which the tongue T of the stud 50 is normally disposed. A thrust collar 62 is disposed on the slotted end of each shaft 51 adjacent to the shoulder of each threaded shank of a stud. A roller is mounted on each shaft 51 as in the mill unit rst described.

The angular positions of the rollers may be altered to suit the requirements of various materials to be processed, in the following manner: The nuts 5|-52 are loosened and the shafts 51 swung on the pins 60 to the desired angular positions, the wedge spacer collars are turned to the proper relative positions to accommodate the new positions of the shafts 51, and the nuts tightened. As the rollers travel over the material being processed, the inner ends can rise and fall because of the vertical movement of the guide block as ln the mill unit first described, said movement being facilitated by the tongue and slot assembly at the outer end of the shafts 53.

I claim:

1. A mill comprising a frame structure; a bearing mounted in the lower portion of said frame structure; a bearing mounted in the upper portion of said frame structure; a vertical shaft mounted in said bearings; a horizontally disposed guide structure provided with vertical guideways and mounted on said vertical shaft; a block .provided with a bearing and disposed in each guideway so as to move vertically therein; a series of horizontally disposed arms mounted on said guide structure and extending outward therefrom; a vertically disposed lug depending from the outer end portion of each horizontal arm; a block pivotally mounted in each depending lug; a horizontally disposed shaft having one end connected to the last named block and the other end slidably disposed in the rst named block; a roller rotatably mounted on each horizontal shaft; a horizontally disposed grinding table mounted in the lower portion of said frame structure below said rollers and adapted to cooperate therewith; and a horizontally disposed driving band mounted on the outer ends of said horizontally disposed arms.

2L A mill comprising a frame structure; a bearing mounted in the lower portion of said frame structure; a bearing mounted in the upper portion of said frame structure; a vertical shaft mounted in said bearings; a horizontally disposed guide structure provided with vertical guideways and mounted on said vertical shaft; a block provided with a bearing and disposed in each guideway so as to move vertically therein; a series of horizontally disposed arms mounted on said guide structure and extending outward therefrom; a vertically disposed lug depending from the outer end of each horizontal arm; a block pivotally mounted in each depending lug; a horizontally disposed shaft having one end connected to the last named block and the other end slidably disposed in the first named block; a roller rotatably mounted on each horizontal shaft; and a horizontally disposed grinding table mounted in said frame structure below said rollers and adapted to cooperate therewith.

3. A mill comprising a frame structure; a bearing mounted in the lower portion of said frame structure; a bearing mounted in .the upper .portion of said frame structure; a vertically disposed shaft mounted in said bearings; a horizontally disposed guide structure provided with vertical guideways and mounted on said vertical shaft; a series of horizontally disposed arms mounted on said guide structure and extending Search nuo outward therefrom; a vertically disposed lug depending from the end portion of each horizontal arm; a horizontally disposed shaft disposed below each horizontal arm, one end of said shaft being pivotally connected to a depending lug and the other end slidably disposed in a. guideway of the guide structure; a roller rotatably mounted on each horizontal shaft; and a grinding table mounted in said frame structure below said roller and adapted to cooperate therewith.

4. A mill comprising a frame structure; a bearing mounted in the lower portion of said frame structure; a bearing mounted in the upper portion of said frame structure; a vertically disposed shaft mounted in said bearings; a horizontally disposed guide structure provided with vertical guideways and mounted on said vertical shaft; a series of horizontally disposed arms mounted on said guide structure and extending outward therefrom; a lug depending from the outer end portion of each horizontal arm; a horizontally disposed shaft disposed below each horizontal arm, one of said shafts being pivotally connected to a depending lug and the other end slidably disposed in a guideway in said guide structure; a roller rotatably mounted on each horizontal shaft; a stepped cone member integral with the inner end of each roller; and a grinding table mounted below said rollers and adapted to cooperate therewith.

5. A mill comprising a frame structure; a. bearing mounted in the lower portion of said frame structure; a bearing mounted in the upper portion of said frame structure; a vertically disposed shaft mounted in said bearings; a guide structure provided with vertical guideways and mounted on said vertical shaft; a block provided with a bearing and slidably disposed in each guideway; a series of horizontally disposed arms mounted on said guide structure and extending outward therefrom; a lug depending from the outer end portion of each lug; a block pivoted in each lug; a horizontally disposed shaft under each horizontal arm, one end of said shaft being connected to the last named block and the other end slidably disposed in the rst named block; a roller rotatably mounted on each horizontal shaft; a stepped cone member integral with the inner end of each roller; and a grinding table mounted below said rollers and adapted to cooperate therewith.

6. A mill comprising a frame structure; a bearing mounted in the lower portion of said frame structure; a bearing mounted in the upper portion of said frame structure; a vertically disposed shaft mounted in said bearings; a guide structure provided with vertical guideways and mounted on said vertical shaft; a series of horizontally disposed arms mounted on said guide structure and extending outwardly therefrom; a lug depending from the outer end of each horizontal arm; a horizontally disposed shaft under each horizontal arm, one of said horizontal shaft being pivotally connected to a depending lug and the other end slidably disposed in a guideway in the guide structure; a roller rotatably mounted on each horizontal shaft; a stepped cone member integral with each roller at the inner end; a feed tube mounted in said guide structure; a conical distributor member mounted on said vertical shaft below said feed tube; and a grinding table mounted below said rollers and adapted to cooperate therewith.

7. A mill comprising a frame structure; a bearing mounted in the lower portion of said frame structure; a bearing mounted in the upper portion of said frame structure; a vertical shaft mounted in said bearings; a horizontally disposed guide structure provided with vertical guideways and mounted on said vertical shaft; a series of horizontally disposed arms mounted on said guide structure and extending outward therefrom; a lug depending from the outer end of each horizontal arm; a horizontally disposed shaft, one end of which is pivotally connected to a depending lug and the other end disposed in a guideway of said guide structure and adapted to move vertically therein, there being a horizontally disposed shaft for each horizontally disposed arm; a roller rotatably mounted on each horizontally disposed shaft; a horizontally disposed grinding table mounted in said frame structure below said roller and adapted to cooperate therewith; a vertically disposed feed tube, the lower portion of which is disposed in said guide structure; a hori.. zontally disposed driving band mounted on the `horizontally disposed arms; a conical distributing member mounted on said vertical shaft below said feed tube; a Vertical adjusting means for said vertical shaft; and a stepped cone mounted on each horizontal shaft.

8. A mill comprising a frame structure; a bearing mounted in the lower portion and a bearing mounted in the upper portion of said frame structure; a vertical shaft mounted in said bearings; a horizontally disposed guide structure provided with vertically disposed guideways and mounted on said vertical shaft; a block provided with a bearing and slidably disposed in each guideway; a 'series of horizontally disposed arms mounted on said guide structure and extending outward therefrom; a lug depending from the outer end of each horizontal arm; a block pivotally mounted in each depending lug; a horizontally disposed shaft, one end of which is disposed in the last named block and pivotally connected thereto; and the other end slidably mounted in the first named block; a roller provided with a stepped cone portion and mounted on said horizontal shaft, there being a horizontal shaft under each horizontal arm; a feed tube, the lower portion of which is disposed in said guide structure; a distributing member mounted on said vertical shaft below said feed tube; a driving band mounted on the outer ends of said horizontal arms; means to adjust said vertical shaft longitudinally mounted on said upper bearing; and a circular grinding table mounted in said frame structure below said rollers.

9. A mill comprising a frame structure; a bearing mounted in the lower portion of said frame structure; a bearing mounted in the upper portion of said frame structure; a vertical shaft mounted in said bearings; a horizontally disposed guide structure provided with vertical guide ways and mounted on said vertical shaft; a plurality of horizontally disposed arms mounted on said guide structure and extending outward therefrom; a plurality of jointed guide blocks, one member of each guide block being slidably disposed in a vertical guide way; a driving band mounted on the outer ends of said horizontal arms; an auxiliary band spaced from said driving band and secured thereto by suitable means; a vertically disposed feed tube mounted in said guide structure; horizontally disposed shafts, each shaft being provided with a slot in its outer end portion and the inner end portion disposed in a member of a jointed guide block; a roller mounted on each horizontal shaft; a series of studs, each stud being provided with a threaded shank and a tongue, the tongue being disposed in the slot in the end portion of the adjacent horizontal shaft and the shank extending through the slot between said bands; a nut screwed on each shank on the inner side of said bands and a nut screwed on each shank on the outside of said bands; and a grinding table mounted in said frame structure below said rollers.

10. A mill comprising a frame structure; a bearing mounted in the lower portion and a bearing mounted in the upper portion of said frame structure; a vertical shaft mounted in said bearings; a horizontally disposed guide structure provided With vertical guide ways and mounted on said shaft; a plurality of horizontally disposed arms mounted on said guide structure and extending outward therefrom; a plurality of jointed guide blocks, one member of each guide block being disposed in a guideway in said guide structure; a driving band mounted on the outer ends of said horizontal arms; an auxiliary band spaced from said driving band to provide a slot and secured to the driving band by suitable means; a vertically disposed feed tube mounted in said guide structure; horizontally disposed shafts, each shaft being provided with a slot in its outer end and the inner end disposed in a member of a jointed guide block; a roller mounted on each horizontally disposed shaft; a grinding table mounted in said frame structure below said rollers; a series of studs, each stud being provided with a threaded shank and a tongue, the tongue being disposed in the slot in the adjacent horizontal shaft and the shank extending through the slot between said bands; a nut screwed on each shank on the inside of said bands and a nut screwed on each shank on the outside of said bands; a pair of wedge spacer collars disposed on each shank between the nut on the inside of said band and the bands, and a pair of wedge spacer collars disposed on each shank between the nut on the outside of said bands and the bands; and a thrust collar on the outer end of each horizontal shaft adjacent to the shoulders of the shank of each stud.

WILLIAM B. CHAPMAN.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 2,327,402 Clark Aug. 24, 1943 2,115,314 McErlean Apr. 26, 1938 '774,329 Merralls Nov. 8, 1904 802,787 Vaughn Oct. 24, 1905 233,383 Tuck Oct. 19, 1880 

